本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。
# 對與 Yamaha 客戶閘道裝置的 AWS Site-to-Site VPN 連線進行故障診斷
當您對 Yamaha 客戶閘道裝置的連線問題進行故障診斷時，請考量四件事：IKE、IPsec、通道和 BGP。您可依任何順序故障診斷這些區域，但建議您從 IKE 開始 (網路堆疊底部的)，一路向上。
**注意**
根據預設，IKE 第 2 階段中使用的 `proxy ID` 設定會在 Yamaha 路由器上停用。這可能會造成連線至 Site-to-Site VPN 的問題。如果您的路由器上未設定 `proxy ID` ，請參閱 AWS提供的範例組態檔案，以便 Yamaha 正確設定。
## IKE
執行下列命令。回應顯示客戶閘道裝置的 IKE 設定正確。
```
# show ipsec sa gateway 1
```
```
sgw flags local-id remote-id # of sa
--------------------------------------------------------------------------
1 U K YOUR_LOCAL_NETWORK_ADDRESS 72.21.209.225 i:2 s:1 r:1
```
您應該會看到一行包含通道中所指定遠端閘道的 `remote-id` 值。您可藉由省略通道編號，列出所有安全關聯 (SA)。
如需進一步故障診斷，請執行下列命令啟用提供診斷資訊的 DEBUG 層級日誌訊息。
```
# syslog debug on
# ipsec ike log message-info payload-info key-info
```
若要取消記錄的項目，請執行下列命令。
```
# no ipsec ike log
# no syslog debug on
```
## IPsec
執行下列命令。回應顯示客戶閘道裝置的 IPsec 設定正確。
```
# show ipsec sa gateway 1 detail
```
```
SA[1] Duration: 10675s
Local ID: YOUR_LOCAL_NETWORK_ADDRESS
Remote ID: 72.21.209.225
Protocol: IKE
Algorithm: AES-CBC, SHA-1, MODP 1024bit
SPI: 6b ce fd 8a d5 30 9b 02 0c f3 87 52 4a 87 6e 77
Key: ** ** ** ** ** (confidential) ** ** ** ** **
----------------------------------------------------
SA[2] Duration: 1719s
Local ID: YOUR_LOCAL_NETWORK_ADDRESS
Remote ID: 72.21.209.225
Direction: send
Protocol: ESP (Mode: tunnel)
Algorithm: AES-CBC (for Auth.: HMAC-SHA)
SPI: a6 67 47 47
Key: ** ** ** ** ** (confidential) ** ** ** ** **
----------------------------------------------------
SA[3] Duration: 1719s
Local ID: YOUR_LOCAL_NETWORK_ADDRESS
Remote ID: 72.21.209.225
Direction: receive
Protocol: ESP (Mode: tunnel)
Algorithm: AES-CBC (for Auth.: HMAC-SHA)
SPI: 6b 98 69 2b
Key: ** ** ** ** ** (confidential) ** ** ** ** **
----------------------------------------------------
SA[4] Duration: 10681s
Local ID: YOUR_LOCAL_NETWORK_ADDRESS
Remote ID: 72.21.209.225
Protocol: IKE
Algorithm: AES-CBC, SHA-1, MODP 1024bit
SPI: e8 45 55 38 90 45 3f 67 a8 74 ca 71 ba bb 75 ee
Key: ** ** ** ** ** (confidential) ** ** ** ** **
----------------------------------------------------
```
對於每個通道界面，您應該都會同時看到 `receive sas` 和 `send sas`。
如需進一步故障診斷，請使用下列命令啟用除錯。
```
# syslog debug on
# ipsec ike log message-info payload-info key-info
```
執行下列命令以停用除錯。
```
# no ipsec ike log
# no syslog debug on
```
## 通道
首先，請檢查您有沒有必要的防火牆規則。如需規則清單，請參閱[AWS Site-to-Site VPN 客戶閘道裝置的防火牆規則](FirewallRules.md)。
如果您的防火牆規則設定正確，則繼續使用下列命令來進行故障診斷。
```
# show status tunnel 1
```
```
TUNNEL[1]:
Description:
Interface type: IPsec
Current status is Online.
from 2011/08/15 18:19:45.
5 hours 7 minutes 58 seconds connection.
Received: (IPv4) 3933 packets [244941 octets]
(IPv6) 0 packet [0 octet]
Transmitted: (IPv4) 3933 packets [241407 octets]
(IPv6) 0 packet [0 octet]
```
確定 `current status` 值為上線，而且 `Interface type` 為 IPsec。確定均於這兩個通道界面上執行此命令。若要解決此處的任何問題，請檢閱組態。
## BGP
執行下列命令。
```
# show status bgp neighbor
```
```
BGP neighbor is 169.254.255.1, remote AS 7224, local AS 65000, external link
BGP version 0, remote router ID 0.0.0.0
BGP state = Active
Last read 00:00:00, hold time is 0, keepalive interval is 0 seconds
Received 0 messages, 0 notifications, 0 in queue
Sent 0 messages, 0 notifications, 0 in queue
Connection established 0; dropped 0
Last reset never
Local host: unspecified
Foreign host: 169.254.255.1, Foreign port: 0
BGP neighbor is 169.254.255.5, remote AS 7224, local AS 65000, external link
BGP version 0, remote router ID 0.0.0.0
BGP state = Active
Last read 00:00:00, hold time is 0, keepalive interval is 0 seconds
Received 0 messages, 0 notifications, 0 in queue
Sent 0 messages, 0 notifications, 0 in queue
Connection established 0; dropped 0
Last reset never
Local host: unspecified
Foreign host: 169.254.255.5, Foreign port:
```
應會列出兩個鄰近項目。每一個都應該會看到 `BGP state` 的數值為 `Active`。
如果 BGP 對等互連已啟動，請確認您的客戶閘道裝置是否向 VPC 公告預設路由 (0.0.0.0/0)。
```
# show status bgp neighbor 169.254.255.1 advertised-routes
```
```
Total routes: 1
*: valid route
Network Next Hop Metric LocPrf Path
* default 0.0.0.0 0 IGP
```
此外，確定您會從虛擬私有閘道收到對應至您 VPC 的字首。
```
# show ip route
```
```
Destination Gateway Interface Kind Additional Info.
default ***.***.***.*** LAN3(DHCP) static
10.0.0.0/16 169.254.255.1 TUNNEL[1] BGP path=10124
```